Cap mechanism for treating felled green timber



Marc i, 1938.

M. M. CLAPSHAW 2,109,467

FELLED GREEN TIMBER 2 Sheets-Sheet 1 M. M. CLAPSHAW ELLED GREEN TIMBER 2 Sheets-Sheet 2 March 1, 1938.

CAP MECHANISM FOR TREATING F Filed April 11, 1934 o]? use.

Patented Mar. 1, 1938 CAP MECHANISM" F0 R TREATING FELLED GREEN TIMBE Myron M. Ciapshaw,

Portland; Greg, by mesne assignments; to

assign'or, Mineralized 'CelP Wood'P'reservihg Company, Seattie, Wash., a V corporation of: Delaware 7 Y Application April 11,1934, Seria!iNo..720,111

7 Claims.

When made of ironthey are subject by the chemicals forming proposedtoovercome the chemicai-efiect of the treating solution quired elasticity to fit varying to attack' per. square inch.v

Also whena rubber capis formed of vulcanizedv fabric and rubber, the

And which cap means, overcomes the objections above mentioned;

This application is a continuationr-in-part of the cap apparatus. tus which may be adjusted'to the ends of timbers ofv varying diameters.

facilitated. And only a steady flow and pressure is maintained on the cell walls such as to prevent reaction between the treating solution and the sap in fact or in the presence of the sap.

The above mentioned general objects of my invention, together with others inherent in the same, are attained by the device illustrated in the following drawings, the same being preferred exemplary forms of embodiment of my invention, throughout which drawings like reference numerals indicate like parts:

Fig. 1 is a view in side elevation of the end portion of a pole and an apparatus attached thereto for impregnating the said pole with the preserving solution;

Fig. 2 is a view in Fig. 1;

Fig. 3 is a view in longitudinal section of the pole with bark removed to form a bearing for the cap;

Fig. l is a view of a modified form of cap securing means by which the cap is held with a liquid tight seal against the timber, either with the bark in part thereon or on the peeled pole;

Fig. 5 is a view in perspective of the tightening member for the cable or cap engaging means of said securing means of Fig. 4;

Fig. 6 is an enlarged end of one cable;

Fig. '7 is a view of said securing means;

Fig. 8 is a view of choring means;

Fig. 9 is a view of still another modified form of a cap anchoring means;

Fig. 10 is a blank of rubber coated fabric of which the body of the cap is formed;

Fig. 11 is a blank of a rubber coated fabric of which the end portion of the cap is formed;

Fig. 12 shows the mold on which the body blank is positioned;

Fig. 13 is a view in cross section of the modified form of a pole cap formed of elastic material embodying my invention;

Fig. 14 is a view in perspective of a reinforcing cap to encase pole treating cap shown in Fig.

longitudinal section of end of the the cable clampingplate of a modified form of cap an- Fig. 15 is a plan view with parts broken away of the cap securing Fig. 16 is a view in perspective of a modified form of the tightening member for the cable, i. e. cap engaging means;

Fig. 1'? is a. view of a modified form of cap engaging means; and

Fig. 18 is a view in cross-section on dotted line l8-l3.

of the solution with timber, the apparatus shown in the drawings is efficient and practical, and provides for a thorough and uniform treatment of the timber. The cap 3 is secured to the end of the pole 4. The end of the pole is partially trimmed to form a more or less smooth or uniform bearing portion 5 for the cap. In 5 it is preferable to leave a part of the bark upon the pole and not strip it to the wood structure entirely. This provides for a thorough impregnation of throughout the portion of to the bark. An extra supply of chemicals may locate between the bark and the woody structure. This is particularly advantageous where the pole is to be used as a piling with the bark left on. There is no necessity for beveling off the annular edge of the pole, and particularly do I not the sap want to cut the sap wood. The form of the cap of my invention is such as to provide for fitting upon poles of varying diameters Without such cutting, and at the same time of a form to prevent air cutting off access of the liquid to the sapwood disposed to the upper part of the butt end of the pole, as well of a rubber fabric material which is non-reacting with the treating solution and flexible so as to be secured with a liquid tight seal to the pole.

The cap is practically a angle 6 between the side 1 and the end wall 8, while the angle 9, i. e., the angle between the end wall 8 and the side It] is preferably obtuse. In longitudinal section the cap has substantially the form of a truncated cone, having the top side perpendicular to the plane of the ends. That portion of the cap which is attached to the log is herein termed the base portion, While the opposite end portion is called the top portion. That part of the cap which is substantially in line with the top of the log lying in general in a hori- Zontal position is referred to herein as the upper portion of the cap. The cap may position on the end'of the pole by means of a wire cable or other similar means H, the ends of which are secured by a cable tightening means l2. Also a further securing means may be employed in the form of a U shaped member !3 having spears or dogs M which may be driven into the timber to insure the fast securing of the cap to the end portion of the pole when the solution in the cap is subjected to pressure. It will be understood that the continued pumping of the fluid to the cap creates a vibration that will gradually work the securing means loose so that it is not liquid tight unless particularly efficient securing means are provided.

An air escape valve I5 is provided in the upper wall portion of the cap so that air pockets will not form and prevent the chemical solution from having full and free access to the sap wood part of the log in the upper part of the log. Also an inlet conduit it, which has valve ll, is attached to the lower part of the top portion of the cap so as to serve also as a for draining off the unused chemicals down to the level of said inlet conduit when the treating is completed. The remaining liquids may be readily caught in a vessel upon loosening the securing means The conduit l6 connects with any suitable confined receptacle in which the treating solution is contained, and to which said solution fluid pressure may be applied. Upon opening the valve I! the solution runs into the cap 3 and any confined air is then permitted to escape through valve l5 so that the cap 3 is completely filled with the treating solution. When the cap 3 is completely filled with the treating solution the air venting valve 15 is closed. During the treating period as the solution is pumped or otherwise supplied under pressure to the cap, air collects and the venting of the air must be repeated from time to time to positively avoid allowing a pocket of air to form. The fluid pressure exerted upon the treating solution is preferably between 5 and 25 lbs. The magnitude of the pressure obviously depends upon the density of the particular Wood being treated and the length of the said poles to I be treated.

gitudinally considered is shownzhavingna flange The blanks 5lrare=placedx.uponzthe.1110161523. 5 l9 witha claw memb r zoodis sedwithrod. 2-1: and: the? edges 53- and 54 are; caused to'overlap; extending through-opening 22 in the flange l9; and then a secondblank; exactlylike' 5:1, is: added, so that a nut123may;beemployedgto;idrawa-cl-amp. however'with thejoint placed .at a 120 position member 20:toWard the flange Claw'member 20 with respect" to the:first joint;..andiathird blank.

lozhas a transversely directed plate 24-; seeFig; 5-l isadded-withitsjoint spaced"24 m-$ there is a clamping platen having a roovezs are. placed in staggered relation withirespect to? d b t 1 1 29 A cap;engaging meansas za the notches ofunderlying. blanks. :55;.so that the Wire cable is provided with-an enlargecl end notches or: joints a e not d rectly sup mpos dportion 3| which is'disposediwithinzth law The assembly is. then Vulcanized: into a unit. of the claw memb 20. Th undu f f leaving.v live rubber. between the fabric memethe log 4 and beneath-the flange-le a'nd-through finished capand the: capiwalls as a: whole are groove 23 Then 1t' 3:| drawn tig t flexible. This provides fort cinchingztheacapwalls that the cable 30 is clamped tight against the: to theuneven surface of the pole ba k r p 25*plate l8. Thereupon the cable isdrawn t a with asubstantial.bearingz'andaliquid tightseal;

ber 20. The plate 2'4; together with pin 25; optively high elastic rubber,- so that the base. por-- I crates to keep the claw member 20 from-turning tion may be adjusted to the buttends of poles of.

3 axially. The plate24-has a bearing-against the 'fl ent' diameter h y-merely stletching-:the base. underside of substantially'the entire width of the D h p is p d-w a air Valve plate l8. 59 andafluid inlet conduit-3.60. A.cap.-securing In plac in Fig. l, to provide an-anchoring-means-forthewn at This may be of the type 0 03b *cap s, it is preferable not to rupture the bark 30, with as o iated clampingv plateand its and the wood structure therebeneath, because V i sm m il t n Maniall such openings permit the-escape of the treatfi y; a fi h p r s d- I means ing solution. To avoid this; varying typesof 6|, an m y e d wn er -ti ht' y eing w t anchoring means are provided.- such as are il after being p ac d in DOSitiOH-OHthB p-- lo lustrated in Figs. 8 and 9. In Fig. 8 an anchor'- 0V the D body 5s 'isl laced"are nfo ci 40' ing chain 32 is providedwith a cinching means ap 6 Fi 4")'- f'r iv lyn m lastic ma At spaced intervals on chain 32, are short chain vided for conduit 60. Straps 65 with cinch lengths 40. The anchoring chain 32 is placed buckles 66 and hooks 61 are provided to secure around the log some 18 inches or two feet from ap 62 to an h r n m n 6 wh h m y be f i the base of the cap 3. Thereupon lever 33 is a suita l p su as for amp as s shown shown in Fig. 9. The lever 33 is omitted here In i 6, is s w a modified form of fi and a hook 42 with an upturned flange 43 is ening means 69 which has fl ng s 0 o en a e provided with an opening 44 through which pin the late al ed s of p a l3 nd as book or tightening member 45 extends, which likewise n place o a law as member passes through a flanged plate 46. Nut 41 serves In Fig. 17, a modified form of cap engaging as an adjusting means to draw plate 4% towards means in the form of a band 72 of spring metal short laterally disposed chain members 49 with tact between the cap and the timber. hooks 50. Obviously, in general changes may be made in In Fig. 10 is illustrated a blank 5! for formthe forms, dimensions and arrangements of the ing the body portion of the cap 3 on the mold parts of my invention, unless the context indilOI'tl'OllS 53 and 54 are provided on each end of 1. A device of the character described, embe blank 5! to provide the joint. bodying a flexible pole treating cap formed of In Fig. 11 a cap blank 55 is shown to form the fabric reinforced rubber Walls, said cap having 76 a pliable circumferential edge portion conformable under a binding cable with the uneven circumferential bearing of exposed sap wood of a felled tree to form a liquid tight seal and a cap securing means having a cap engaging means, a securing plate, the end portions of said cap engaging means overlapping directly beneath said plate over an arc of such length as to bring the secured ends substantially beneath the line tangent at the point in about the middle of the arc beneath said plate of said cap engaging means.

2. A device of the character described, embodying a cap formed of flexible, elastic vulcanized wall, said cap being of truncated cone form 7. in longitudinal section, said form rendering the base portion capable of being fitted to logs of varying diameters, the upper wall portion of said cap being substantially in line with the upper portion of the log; and an air escape valve disposed in said upper wall portion in the end portion of the cap removed from the log.

3. In a device of the character described, a pole cap securing means comprising a cap engaging means; an are shaped plate having at one end a cap engaging means tightening member,

and on the other end, a clamping means for one end of said cap engaging means, said are shaped plate being of such length as to cause the end portions of the cap engaging means to lie side by side and to cause the secured ends of the cap engaging means to lie positioned substantially beneath the line tangent to about the middle point of the arc beneath said plate of said cap engaging means.

4. In a device of the character described, a pole cap securing means comprising a cap engaging means; an arc shaped plate having a flange on one end with a hole therethrough, and a longitudinally directed slot in said plate; a cap engaging means tightening member having a pin operatively positioned in said slot and a claw member on one end and a threaded portion on one end, which threaded portion extends through and in operative engagement with the walls of the hole in said flange; and a cap engaging means clamping plate and means to secure said plate to the end of said arc shaped plate opposite to the flange end of said arc shaped plate, said plate being of such length as to cause the end portions of the cap engaging means to lie side by side and to causethe secured ends of the cap engaging means to lie positioned substantially beneath the line tangent to about the middle point of the arc beneath said plate of said cap engaging means.

5. In a device of the character described, a pole treating cap formed of a plurality of superimposed fabric blanks having vulcanized rubber coated faces, the said rubber coating being elastie to permit movement of one blank with respect to the other.

6. A device of the character described, comprising a pole treating cap formed of live rubber of high elasticity and pliability, whereby said cap is conformable under a binding cable with the uneven circumferential bearing of the exposed sap wood of the felled tree to form a liquid tight seal; an air escape valve disposed in the upper wall portion thereof; means to secure said cap upon the pole; and a reinforcing cap of flexible non-elastic material disposed over said treating cap.

'7. A device of the character described, comprising a pole treating cap formed of live rubber of high elasticity and pliability, whereby said cap is conformable under a binding cable with the uneven circumferential bearing of the exposed sap wood of the felled tree to form a liquid tight seal; an air escape valve disposed in the upper wall portion thereof; means to secure said cap upon the pole; and a reinforcing flexible non-elastic material disposed over said pole treating cap.-

MYRON M. CLAPSHAW.

pole

laced cap of 

